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Finding the Fourth Proportional to 129,959.20, 194,841.60 and 70,861.60

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Solution

The fourth proportional to 129,959.20, 194,841.60 and 70,861.60 is: 106,239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,959.20 : 194,841.60 = 70,861.60 : x
  2. Step 2: Convert to fraction form
    129,959.20/194,841.60 = 70,861.60/x
  3. Step 3: Cross multiply
    129,959.20x = 194,841.60 × 70,861.60
  4. Step 4: Simplify right side
    129,959.20x = 13,806,787,522.56
  5. Step 5: Solve for x
    x = 13,806,787,522.56/129,959.20
  6. Step 6: Final answer
    x = 106,239.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.